28539156828 has 72 divisors (see below), whose sum is σ = 83422173072. Its totient is φ = 7526808576.

The previous prime is 28539156823. The next prime is 28539156839. The reversal of 28539156828 is 82865193582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28539156823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1859125 + ... + 1874412.

Almost surely, 2^28539156828 is an apocalyptic number.

28539156828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28539156828 is an abundant number, since it is smaller than the sum of its proper divisors (54883016244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28539156828 is a wasteful number, since it uses less digits than its factorization.

28539156828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733571 (or 3733562 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 57.

The spelling of 28539156828 in words is "twenty-eight billion, five hundred thirty-nine million, one hundred fifty-six thousand, eight hundred twenty-eight".